This download link is referred from the post: DU B-Tech Last 10 Years 2010-2020 Previous Question Papers (University of Delhi)
Instructions:
- Immediately on receipt of the question paper, check to ensure that all the parts of the question paper Part I and Part II are present.
- There are two parts.
- Part I has one question which is compulsory.
- From Part II attempt any four out of six questions.
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PART I
- (a) Define modulation. What is the need for modulation? (6) FirstRanker.com
PART II
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- (a) What are the advantages of SSB over DSBFC. Give the applications of SSB. (3)
- (b) Calculate the percentage power saving when carrier and one of the side bands are suppressed in an AM wave modulated to a depth of 100%. (4)
- (a) Derive expression of an FM wave, v(t) = 10cos(106t+4sin103t) (3)
- (b) Draw the block diagram of a PCM system. (3)
- (a) Compare PWM and PPM. (3)
- (b) For the following data draw the following line codes :
- (i) Bipolar NRZ
- (ii) Unipolar RZ
- (iii) Unipolar NRZ
- (vi) Manchester (4)
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- (a) State the sampling theorem. (3)
- (b) What are the advantages of digital modulation over analog modulation? (3)
- (a) Find the value of reflection coefficient and VSWR for a transmission line.
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This download link is referred from the post: DU B-Tech Last 10 Years 2010-2020 Previous Question Papers (University of Delhi)